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Structural Control of the Getang Carlin-Type Gold Deposit in Southwest China

Journal of Earth Science 2024年第2期35卷 536-552页

作者： Guoping Zeng Xinlu Hu Diwei Luo Jianzhong Liu shuzhen yao Yongjie Jin Wuhan Center China Geological SurveyWuhan430205China Central South China Innovation Center for Geosciences Wuhan430205China Faculty of Earth Resources China University of GeosciencesWuhan430074China Geological Party 105 Guizhou Bureau of Geology and Mineral Exploration&DevelopmentGuiyang550018China

The Getang is a representative Carlin-type gold deposit in Southwest China.It has a proven reserve of about 30 tonnes at an average grade of 5.1 g/t Au.The orebodies occur as strat-abound lenses,and are structurally controlled by shallow NWW-and NE-trending fold-fault systems and the unconformity between the Upper and Middle Permian.In this study,the regional-and deposit-scale structural investigations,joints and finite strain measurements,and stress and dynamic analysis were conducted with an aim to reveal the structural process of the Getang gold deposit and clarify the relationship between the gold mineralization and structures.Three phases of deformation were identified in the deposit:(1)paleokarst was generated by a crustal uplift when the Youjiang Basin experienced extension at the end of the Middle Permian,laying the foundation for the unconformity;(2)the NW-trending structures were formed under a NNE-SSW compression during the Indochina-South China collision(Indosinian orogeny)in Triassic;(3)the NE-trending structures were generated or reactivated under a NW-SE-oriented compression during the Yanshanian intracontinental orogeny.The unconformity recorded two episodes of tectonic evolution in the NNE-SSW and NW-SE directions.Structural analyses and geochronology data suggest that the Getang gold deposit was formed as a result of tectonic transition from compression to extension during the Yanshanian intracontinental orogeny.

关键词： Carlin-type gold deposit structural features finite strain Getang Southwest China economy geology geochemistry

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A Software Safety Requirements Elicitation Approach Based on Hazardous Control Action Tree Modelling

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Chinese Journal of Electronics 2021年第4期30卷 676-685页

作者： ZHU Danjiang yao shuzhen TAN Huobin The 32nd Research Institute of China Electronics Technology Group Corporation School of Computer Science and Engineering Beihang University

Software safety requirements are crucial for safety assurance of safety-critical software systems. A novel accident causality model, Systems-theoretic accident modeling and processes(STAMP), has been proposed to overcome the limitations of traditional safety techniques in software safety requirements elicitation.However,the STAMP-based method is ad-hoc with no rigorous procedure to elicit software safety requirements effectively.Furthermore, the time-related safety requirements, which are important to software safety, have been paid little attention in STAMP-based method. With the purpose of overcoming these limitations, this paper strives to find a systematic approach to elicit software safety requirements with STAMP, especially the time-related safety requirements. Firstly, a new process model of STAMP is proposed to model all the system varilables and the ralationship of them in control processes. Then based on the process model, an approach HCAT-SSRA is proposed to elicit the software safety requirements by building Hazardous control action tree(HCAT) for each control action in system control processes. Additionally,several rules are proposed to guide time-related software safety requirements analysis. Finally, a case study is given to illustrate the availability and feasibility of the proposed method.

关键词： Software safety Software safety requirements analysis(SSRA) Requirements elicitation

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Geochemistry, U-Pb Geochronology and Sr-Nd-Hf Isotopes of the Early Cretaceous Volcanic Rocks in the Northern Da Hinggan Mountains

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Acta Geologica Sinica(English Edition) 2015年第1期89卷 203-216页

作者： HU Xinlu yao shuzhen HE Mouchun DING Zhenju CHEN Bin Faculty of Earth Resources China University of Geosciences Key Laboratory of Tectonics and Petroleum Resources Ministry of Education State Key Laboratory of Geological Process and Mineral Resources China University of Geosciences

Whole-rock geochemical, zircon U-Pb geochronological and Sr-Nd-Hf isotopic data are presented for the Early Cretaceous volcanic rocks from the northern Da Hinggan Mountains. The volcanic rocks generally display high SiO2 （73.19-77.68 wt%） and Na20＋K20 （6.53-8.98 wt%） contents, with enrichment in Rb, Th, U, Pb and LREE, and depletion in Nb, Ta, P and Ti. Three rhyolite samples, one rhyolite porphyry sample, and one volcanic breccia sample yield weighted mean 206pb/23SU ages of 135.1±1.2 Ma, 116.5±1.1 Ma, 121.9±1.0 Ma, 118.1±0.9 Ma and 116.9±1.4 Ma, respectively. All these rocks have moderate （STSr/S6Sr）i values of 0.704912 to 0.705896, slightly negative eNd（t） values of -1.4 to -0.1, and positive Cur（t） values of 3.7 to 8. Their zircon Hf and whole-rock Nd isotopic model ages range from 594 to 1024 Ma. These results suggest that the Early Cretaceous volcanic rocks were originated from melting of subducted oceanic crust and associated sediments during the closure of the Mongol-Okhotsk Ocean.

关键词： U-Pb geochronology Sr-Nd-Hf isotopes volcanic rocks Early Cretaceous Da HingganMountains

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Revenue-maximizing online stable task assignment on taxi-dispatching platforms

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Frontiers of Computer Science 2022年第6期16卷 175-177页

作者： Jingwei LV Ze ZHAO shuzhen yao Weifeng LV School of Computer Science and Engineering Beihang UniversityBeijing100191China School of Mathematical Science Beihang UniversityBeijing100191China

1 Introduction and contributions With the rapid development of mobile Internet,taxi-dispatching platforms have become increasingly popular and important.For example,UBer and Didi are both famous O2O platforms covering the dominating portion of the taxidispatching market over the world.A central issue in taxidispatching platforms is task assignment.

关键词： O2O assignment platforms

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基于残差SDE-Net的深度神经网络不确定性估计

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北京航空航天大学学报 2023年第8期49卷 1991-2000页

作者：王永光姚淑珍谭火彬北京航空航天大学计算机学院北京100191 北京航天计量测试技术研究所国家市场监管重点实验室(人工智能计量测试与标准)北京100076 北京航空航天大学软件学院北京100191

神经随机微分方程模型(SDE-Net)可以从动力学系统的角度来量化深度神经网络(DNNs)的认知不确定性。但SDE-Net面临2个问题,一是在处理大规模数据集时,随着网络层次的增加会导致性能退化;二是SDE-Net在处理具有噪声或高丢失率的分布内数... 详细信息

神经随机微分方程模型(SDE-Net)可以从动力学系统的角度来量化深度神经网络(DNNs)的认知不确定性。但SDE-Net面临2个问题,一是在处理大规模数据集时,随着网络层次的增加会导致性能退化;二是SDE-Net在处理具有噪声或高丢失率的分布内数据所引起的偶然不确定性问题时性能较差。为此设计了一种残差SDE-Net(ResSDE-Net),该模型采用了改进的残差网络(ResNets)中的残差块,并应用于SDE-Net以获得一致稳定性和更高的性能;针对具有噪声或高丢失率的分布内数据,引入具有平移等变性的卷积条件神经过程(ConvCNPs)进行数据修复,从而提高ResSDE-Net处理此类数据的性能。实验结果表明:ResSDE-Net在处理分布内和分布外的数据时获得了一致稳定的性能,并在丢失了70%像素的MNIST、CIFAR10及实拍的SVHN数据集上,仍然分别获得89.89%、65.22%和93.02%的平均准确率。

关键词：神经随机微分方程卷积条件神经过程不确定性估计残差块深度神经网络

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A novel topology with controllable wideband baseband impedance for power amplifiers

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Frontiers of Information Technology & Electronic Engineering 2024年第2期25卷 308-315页

作者： yao yao Zhijiang DAI Mingyu LI School of Intelligent Technology and Engineering Chongqing University of Science and TechnologyChongqing400065China School of Microelectronics and Communication Engineering Chongqing UniversityChongqing400065China

This paper presents a novel topology to control the baseband impedance of a power amplifier(PA)to avoid performance deterioration in concurrent dual-band mode.This topology can avoid pure resonance of capacitors and inductors LC,which leads to a high impedance at some frequency points.Consequently,it can be applied to transmitters that are excited by broadband signals.In particular,by adjusting the circuit parameters and increasing stages,the impedance of the key frequency bands can be flexibly controlled.A PA is designed to support this design idea.Its saturated output power is around 46.7 dBm,and the drain efficiency is>68.2%(1.8-2.3 GHz).Under concurrent two-tone excitation,the drain efficiency reaches around 40%even under 5.5 dB back-off power with the tone spacing from 10 MHz to 500 MHz.These results demonstrate that the proposed topology is capable of controlling wideband baseband impedance.

关键词： Baseband impedance Concurrent dual-band Power amplifier

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On Magma-Genetic Characteristics of Skarn and Its Formation Mechanism

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Journal of Earth Science 1993年第1期12卷 74-79,139页

作者： Lin Xinduo Zhang shuzhen Xu GuqjianChina University of Geosciences , Wuhan 430074 Zhang Chuanling , yao shuzhen and Zhang Dehui also participated in this study .

For skarn type deposits , there are two lands of skarns , skarn formed by filtrating-diffusing metasomatism and vein skarn formed by filling . The vein skarn , discussed this paper and considered to be magmatic genesis , is characterized by: (1) occurring as vein with distinct boundaries with country rocks , yet just the same even in marble easy to be replaced ; (2) composed of a mineral assemblage similar to that of granite ,containing pegmatite as wen as coarse skarn mineral pockets ,and sometimes transited with dike rocks ; (3) dear crystalline feature of deposition ; (4) sideronitic texture ; (5) stowing vesicular, bean-like and flow structures ; (6) very common liquid immiscibility; (7) vertical zoning of gravitational differentiation caused by volatile concentration upwards; (8) associated and transited with non-copper ore bodies of magmatic genesis and tungsten-bearing quartz veins of silicate magmatic genesis rich in volatile ; (9) melt inclusions . Two origins of skam magma . originated by assimilation of silicate magma at its emplacemeot or below it and generated owe to assimilation of deep magma ,corrosion of carbonate strata and liquation , are presented .

关键词： skam ,skam magma ,ore magma .liquid immiscibility.

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Structural control of the Getang Carlin-type gold deposit in Southwest China

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Journal of Earth Science 2021年

作者： Guoping Zeng Xinlu Hu Diwei Luo Jianzhong Liu shuzhen yao Yongjie Jin Wuhan Center， China Geological Survey Central South China Innovation Center for Geosciences Faculty of Earth Resources， China University of Geosciences Geological Party 105， Guizhou Bureau of Geology and Mineral Exploration & Development

The Getang is a representative Carlin-type gold deposit in Southwest China. It has a proven reserve of about 30 tonnes at an average grade of 5.1 g/t Au. The orebodies occur as stratabound lenses， and are structurally controlled by shallow NWW- and NE-trending fold-fault systems and the unconformity between the Upper and Middle Permian. In this study， the regional- and deposit-scale structural investigations， joints and finite strain measurements， and stress and dynamic analysis were conducted with an aim to reveal the structural process of the Getang gold deposit and clarify the relationship between the gold mineralization and structures. Three phases of deformation were identified in the deposit: (1) paleokarst was generated by a crustal uplift when the Youjiang Basin experienced extension at the end of the Middle Permian， laying the foundation for the unconformity; (2) the NW-trending structures were formed under a NNE–SSW compression during the Indochina-South China collision (Indosinian orogeny) in Triassic; (3) the NE-trending structures were generated or reactivated under a NW–SE-oriented compression during the Yanshanian intracontinental orogeny. The unconformity has recorded two episodes of tectonic evolution in the NNE–SSW and NW–SE directions. Structural analyses and geochronology data suggest that the Getang gold deposit was formed as a result of tectonic switch from compression to extension during the Yanshanian intracontinental orogeny.

关键词： Carlin-type gold deposit Structural features Finite strain Getang Southwest China

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New progress of small-molecule drugs in the treatment of inflammatory bowel disease

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Chinese Medical Journal 2024年第5期137卷 556-558页

作者： Dongying yao Zhihua Ran Department of Gastroenterology Zhou Pu Hospital affiliated to Shanghai University of Health&Medical SciencesShanghai 201318China

With the advent of small-molecule drugs,treatment of inflammatory bowel disease(IBD)has reached a new stage.In contrast to biologics,small-molecule drugs can be made into oral dosage forms with a short half-life and are suitable for administration 1–2 times a day.Small-molecule drugs work by inhibiting the transmission of key intracellular signaling pathways in the pathogenesis of ulcerative colitis(UC)and Crohn’s disease(CD)[Figure 1].They do not induce anti-drug antibodies in patients or lead to loss of response after treatment.

关键词： drugs treatment inflammatory

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基于Petri网的UML状态图的形式化模型

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北京航空航天大学学报 2007年第2期33卷 248-252页

作者：郭峰姚淑珍北京航空航天大学计算机学院北京100083

提出一种可以准确描述UML状态图动态特征的形式化模型SC_Net.首先给出了UML状态图的形式化语法定义,其中用状态集合、转移集合、事件集合、条件集合、活动集合、对象集合和变量集合,定义了一系列辅助函数描述UML状态图特征,用确定目标... 详细信息

提出一种可以准确描述UML状态图动态特征的形式化模型SC_Net.首先给出了UML状态图的形式化语法定义,其中用状态集合、转移集合、事件集合、条件集合、活动集合、对象集合和变量集合,定义了一系列辅助函数描述UML状态图特征,用确定目标状态和受限源状态表示层次关系,用开放事件和封闭事件表示对象之间的消息.基于C_Net定义了描述UML状态图动态语义的Petri网模型SC_Net,既能描述状态图中的控制部分,又能描述状态图中的数据处理部分,并给出了从UML状态图到SC_Net的转换步骤,便于实现自动转换过程.最后以柔性制造系统的一个实例说明SC_Net能用于分析UML状态图的性质.

关键词： UML状态图 Petri网形式化语义

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